High temperature anionic Fe(iii) spin crossover behavior in a mixed-valence Fe(ii)/Fe(iii) complex

Abstract

Two ion-pair Fe(III) complexes of (PPh4)[FeIII(HATD)2]·2H2O (1,H3ATD = azotetrazolyl-2,7-dihydroxynaphthalene) and [FeII(phen)3][FeIII(HATD)2]2·3DMA·3.5H2O (2, phen = 1,10-phenanthroline, DMA = N,N-dimethylformamide) were synthesized employing the tridentate ligand of H3ATD. The crystal structural analysis...

A Personal Account on Inorganic Reaction Mechanisms

“…, where phen = 1,10-phenanthroline, DMA = N,N-dimethylformamide and H 3 ATD = azotetrazolyl-2,7dihydroxynaphthalene. [61] It exhibits a high-temperature Fe-(III) spin crossover, which mainly arises from π-stacking, hydrogen interactions, and Coulomb interactions between the [Fe II (phen) 3 ] 2 + and [Fe III (HATD) 2 ] À counterparts.…”

Solvent effect on the structures of three manganese complexes based on azotetrazole-3-hydroxy-2-naphthoic acid: synthesis, structures, and magnetic and fluorescent properties

“…Taking this into consideration, tetrazole and its derivatives, which possess multiple coordination modes, can act as preeminent candidates. 49–51 In this study, we synthesized a tetrazole derivative ligand, namely azotetrazole-3-hydroxy-2-naphthoic acid (H 3 ATNA) (Scheme 1), and obtained three Mn complexes by changing the solvents: Mn 2 (HATNA) 2 (CH 3 OH) 4 ( 1 ), {[Mn 3 (ATNA) 2 (DMF) 2 (H 2 O) 2 ]·0.5DMF·0.5H 2 O} n ( 2 , DMF = N , N -dimethylformamide), {[Mn 6 (ATNA) 4 (H 2 O) 10 ]·8DMSO·2.5H 2 O} n and ( 3 , DMSO = dimethyl sulphoxide). Complex 1 possessed a dinuclear structure with two Mn( ii ) ions that were doubly bridged through N–N linkers from the two tetrazole rings.…”

Syntheses, structures and magnetic properties of mononuclear, dinuclear and tetranuclear dysprosium(iii) complexes based on azotetrazole-3-hydroxy-2-naphthoic acid

“…In our previous studies, other azo ligands have been synthesized and used to construct transition and lanthanide coordination complexes. [54][55][56][57][58][59] Our group successfully constructed a series of dinuclear lanthanide(III) complexes with optical and magnetic properties based on azotriazolyl-3-hydroxy-2-naphthoic acid. 57 Inspired by previous literature reports, we synthesized a new organic ligand H 3 ATNA.…”